﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Data.SqlClient;

namespace DAL
{
    using DAL.Entities;

    public class KhoaDAL : BaseDAL, UTL.IBaseDAL 
    {
        public int Count()
        {
            throw new NotImplementedException();
        }

        public DataTable Select()
        {
            string sql = @" SELECT * FROM khoa";
            return ExecuteQuery(sql);
        }

        public DataTable Select(object obj)
        {
            throw new NotImplementedException();
        }

        public object GetByKey(object key)
        {
            throw new NotImplementedException();
        }

        public bool Delete(string id)
        {
            string sql = @"DELETE FROM khoa WHERE makhoa = '{0}'";
            sql = string.Format(sql,id);
            return ExecuteNonQuery(sql) > 0 ? true : false;
        }

        public bool Insert(object obj)
        {
            var o = (khoa)obj;
            string sql = @"INSERT INTO khoa(makhoa,tenkhoa) VALUES('{0}',N'{1}')";
            sql = string.Format(sql,o.ma_khoa,o.ten_khoa);
            return ExecuteNonQuery(sql) > 0 ? true : false;
        }

        public bool Update(object obj)
        {
            var o = (khoa)obj;
            string sql = @"UPDATE khoa SET tenkhoa='{0}' where makhoa='{1}'";
            sql = string.Format(sql,o.ten_khoa,o.ma_khoa);
            return ExecuteNonQuery(sql) > 0 ? true : false;
        }

        public DataTable Search(string name)
        {
            throw new NotImplementedException();
        }

        public string Select_max()
        {
            string sql = @"SELECT max(substring(makhoa,2,LEN(makhoa)-1)) as id FROM khoa";
            DataTable dt= ExecuteQuery(sql);
            return dt.Rows.Count>0?dt.Rows[0]["id"]+"":"0";
        }



        public bool deleteobj(object obj)
        {
            throw new NotImplementedException();
        }
    }
}
